upd78f0148m1gka1-9eu Renesas Electronics Corporation., upd78f0148m1gka1-9eu Datasheet - Page 379

• Manufacturer Part Number: upd78f0148m1gka1-9eu
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

Address: FF95H
Symbol
(6) Automatic data transfer interval specification register 0 (ADTI0)
Caution Because the setting of bit 5 (STBE0) and bit 4 (BUSYE0) of serial status register 0 (CSIS0) takes
ADTI0
This is an 8-bit register used to specify the interval time between 1-byte communications during automatic
data transfer (bit 6 (ATE0) of serial operation mode specification register 0 (CSIMA0) = 1).
Set this register when in master mode (bit 4 (MASTER0) of CSIMA0 = 1) (setting is unnecessary in slave
mode). Setting in 1-byte communication mode (bit 6 (ATE0) of CSIMA0 = 0) is also valid. When the interval
time specified by ADTI0 after the end of 1-byte communication has elapsed, an interrupt request signal
(INTACSI) is output. The number of clocks for the interval can be set to between 0 and 63 clocks.
This register can be set by an 8-bit memory manipulation instruction. However, when bit 0 (TSF0) of serial
status register 0 (CSIS0) is 1, rewriting ADTI0 is prohibited.
The specified interval time is the serial clock (specified by divisor selection register 0 (BRGCA0)) multiplied by
an integer value.
Example When ADTI0 = 03H
Figure 17-8. Format of Automatic Data Transfer Interval Specification Register 0 (ADTI0)
priority over the ADTI0 setting, the interval time based on the setting of STBE0 and BUSYE0 is
generated even when ADTI0 is cleared to 00H.
Example Interval time when busy signal is not generated
Therefore, clearing STBE0 and BUSYE0 to 0 is required to perform no-wait transfer.
After reset: 00H
7
0
SCKA0
<1> When STBE0 = 1, BUSYE0 = 0: Interval time of two serial clocks is generated
<2> When STBE0 = 0, BUSYE0 = 1: Interval time of one serial clock is generated
<3> When STBE0 = 1, BUSYE0 = 1: Interval time of two serial clocks is generated
6
0
R/W
CHAPTER 17 SERIAL INTERFACE CSIA0
ADTI05
5
User’s Manual U15947EJ3V1UD
Interval time of 3 clocks
ADTI04
4
ADTI03
3
ADTI02
2
ADTI01
1
ADTI00
0
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